Wait... is that mean It can't be done?
Effective clock shows a average in between fluctuations of core clock. When I see i.e. 200MHz what does It tell me? That most of It was sleeping core and some unknown core clock for some time. For me this knowledge is useless (and as most of the users). If...
F.e. - I need instead of showing Core 0 clock I want to display highest clock of all cores. Could you do that?
You could in "custom" tab make some creator so I could mark these sensors and just "show highest"